Vulcan iron works



(No Model.)

B. MoINTIRE. SAW SETTING MACHINE.

N0. 418,874. Patented Jan. "7, 1890.

UNITED STATES PATENT QFFICEO BARTLETT MQINTIRE, OF SAN FRANCISCO,CALIFORNIA, ASSIGNOR TO THE VULCAN' IRON WORKS, OF SAME PLACE.

SAWFSETTING MACHINE.

SPECIFICATION forming part of Letters Patent No. 418,874, dated January'7, 1890.

Application filed June 19, 1889. Serial No. 314,861. (No model.)

To aZZ whom it may concern.-

Be it known that I, BARTLETT MOINTIRE, of the city and county of SanFrancisco, State of California, have invented an Improvement inSaw-Setting Machines; and I hereby declare the following to be a full,clear, and exact description of the same.

My invention relates to the class of machines for setting the teeth ofsaws; and my invention consists in the novel construction andarrangement of parts and their combin ations, hereinafter fullydescribed, and specifically pointed out inthe claims.

The object of my invention is to provide a simple and effectivesaw-setting machine which is specially adapted for the setting of theteeth of band-saws.

Referring to the accompanying drawings for a more complete explanationof my invention, Figure 1 is a perspective view of my saw-set. Fig. 2 isa vertical cross-section through the two anvils and the operatinglever.Fig. 3 is a section of the frame-plate, showing one of the rests E. Fig.4 is a horizontal section through arm M and a plan of the two anvils andthe lever E.

A is the frame-plate of the machine, protudinally in its seat to adjustit, for a purpose presently to be described. This anvil is held in itsplace by means of a top-plate a, secured by a screw-bolt. a The upperinner edge of this, anvil B is, beveled, as shown at Z), and is providednear one end with aprojecting set-lug Z), having'a downwardly-beveledface.

Pivoted at 111 a bracket a on the side of the frame-plate is the movableanvil O, the head of which is provided on its inner edge with'a beveledsurface 0 and a projecting set-lug 0 near one end, and having a beveledface. The beveled faces of the two set-lugs h and 0 correspond to thebeveled surfaces of the opposing anvils, so that when the movable anvilis brought up to the stationary anvil the beveled lugs passone an otherand simultaneously force the adjacent teeth of the saw over in oppositedirections against the beveled faces of the two anvils.

A spring D controls the movement of the anvil O in one direction, andits setting-up movement is effected by means of a lever E, having a camor eccentric head 6, which is pivoted in the top of the bracket a andbears against the back of the anvil O.

F are rests on which the back of the saw is to bear. These rests are twoin number, one on each side of the anvils, and adapted to be verticallymoved, so as to vary and adj nst their heights. They are fitted ingrooved seats in the frame-plate and have elongated slots f, which fitover bolts a passing through the frame-plate and provided with set-nutsa Adjusting-screws f pass down through bearing-pieces a on the bracket aand through the tops of the rests F. By turning these screws the restsmay be raised or lowered to provide for different widths of saws, andwhen in place may be fixed by the setnuts (0 tightening up the bolts of.The vertical movement of the support and of the guide G also providesfor regulating the set of the teeth.

G is a guide for the top of the saw. This guide is vertically moved bymeans of a setscrew 9, which passes through an elongated slot 9 in theguide-body and into the frameplate. I

In order to feed the saw I have the following connections: Mounted in abearing a in the base of the frame-plate is a rock-shaft H,

.one end of which carries an upwardly-extending arm h, the top of whichhas an elongated slot h. Through this slot passes a set-screw h adjustedand tightened by a thumb-nut 72 and upon this screw is loosely pivotedby one end the feed-pawl I, the other end .of which is hooked and isadapted to engage the saw-teeth.

' The other end of the rock-shaft H has a crank J, extending backwardly,and having screwed into its end a slotted bearing j. In this slottedbearing is pivoted a link K, the upper end of which is fitted upon anadjusting-screw L, the end of which is seated in a sliding nut Z, fittedin an elongated slot at in -to any suitable position.

a crank-arm M, secured to the end of the pivotal shaft 6 of the cam oreccentric head e of lever E.

Now, by vibrating the lever E the slotted crank-arm ill is vibrated,and, through the link, the rock-shaft, and the connections described,the feed-pawl is drawn back and forth, and the end of the said pawl,engaging the teeth of the saw, feeds said saw forward as the anvil C iswithdrawn from the anvil B, thereby relieving the saw. Theseconnections, it will be seen, are all adjustable ones. By moving thesliding nut Z in the slotted crank-arm M the throw of the rock-shaft IIis increased or diminished to correspondingly increase or diminish themovement of the feed-pawl I, thus adapting the feed to the differentsizes of sawtooth. The connection between the link K and the crank J ofthe rock-shaft is also an adjustable one, and is formed of the slottedbearing which is screwed into the crank, and has, consequently, an axialmovement, and the pivoted lower end of the link, thereby enabling thelink to be adjusted in the slotted crank-arm M above The primaryposition of the feedpawl is regulated and adjusted by its setting in theslotted upperend of the arm 71 of the rock-shaft.

N is a vertically-adjustable rest on the side of the frame-plate. It isadjusted by means of a set-screw n, passing through the frameplate andthrough an elongated slot 7') in said rest.

,Asbefore stated, the stationary anvil ll has a movement in its recessor socket a, the object of which is to adjust its set-lug I) withrespect to the set-lug c of anvil C, either closer to it or farther fromit, whereby saws with more or less teeth to the inch may beaccommodated. This adjustment of the anvil B is effected by looseningthe securing top plate a and then moving said anvil.

O is aspring for holding the sawto side of the frame-plate.

The operation of the machine is as follows: The saw is put in place withits back supported upon the rests N and F, which are properly adjustedvertically to accommodate the width of said saw. The spring 0, securedto the frame-plate, bears against the side of the saw and holdsitsteady, while the teeth of the saw pass directly under the top guideG. The anvil I3 is properly set for the particular teeth of the saw, andthe feedpawl I rests between the teeth, so as to be ready to feed thesaw forward. The lever E is now brought down toward a horizontalposition and its cam or eccentric head a, hearing against the back ofthe anvil C, moves said anvil forward, so that the saw is pressedbetween the two anvils, while their respective set-lugs, coming incontact with adjacent teeth of the saw, press them simultaneously overin opposite directions, whereby they are properly set. This movement ofthe lever E, through the rock-shaft II and its end eonnections, movesthe feed-pawl, which in this direction slips over the teeth of the sawand engagesa tooth fartherback. Then the lever is raised from itshorizontal position, so that its eccentric head frees the anvil C, thespring of which throws it back away from the anvil B, thus relieving thesaw. This same movc ment of the lever, through its connections, feedsthe pawl forward, so that it moves the saw, which thus presents two newteeth for the succeeding operation of the set-lugs of the an vils.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In a saw-setting machine, the frameplate having the elongated socketor recess a in its top and the bracket a? on its side, in combinationwith the anvildl, mounted in said socket or recess and longitudinallymovable therein, said anvil having a setting-face with a projectingset-lug, the anvil C, pivoted in the bracket a of the frame-plate andhaving a setting-face with a projecting set-lug, the cam or eccentricheaded lever pivoted in the bracket a of the frame-plate and oper atingagainst the back of the anvil 0, whereby it is forced forward, and thespring for returning said anvil, substantially as described.

2. In a saw-setting machine, the combination of the opposing anvils l3and C, having the set-lugs acting on adjacent teeth of the saw, the camor eccentric headed lever and spring for operating the anvil C, and thevertically movable and adjustable rests F for the saw on each side ofthe anvils, substantially as described.

In a saw-setting machine, the combination of the opposing anvils havingthe projecting set-lugs, the cam or eccentric headed lever and springfor operating one of said anvils, the vertically movable and adjustablerests for the saw on each side of said anvils, and thevertically-adjustable guide for the top of the saw, substantially asdescribed.

at. In a saw-setting machine, and in combination with the lever foroperating the setting devices, the feed pawl engaging the teeth of thesaw, and the adjustable connections between said pawl and lever,consisting of the rock-shaft, the arm on one end of the rock-shaft andcarrying the pawl, the slotted crank-arm on the pivotal shaft of theoperating-lever, the crank on the other end of the rock-shaft, and thelink adj ustably connected with the crank of the rock-shaft and with theslotted crank-arm of the pivotal shaft of the lever, substantially asdescribed.

5. 111 a saw-setting machine, and in combination with the lever foroperating the setting devices, the feed pawl engaging the teeth of thesaw, and the adjustable connections between said pawl and lever,consisting of the rock-shaft having an arm 011 one end and a crank onthe other end, the set-screw adjustably connected with the upper end ofthe arm and carrying the feed-pa\vl,the slot- IIO ted crank-arm on thepivotal shaft of the operatingdever, and the link adjustably con nectedwith saidcrank-arin and with the crank of the rock-shaft, substantiallyas described.

6. A saw-setting machine comprising the frame-plate, the adjustableanvil B in said plate, the swinging spring-controlled opposing anvil C,pivoted to said plate, the eccentric or cam headed lever E, operatingagainst the 7 back of the swinging anvil, the verticallymovable restsfor the back of the saw, the verti cally-lnovable guide for the top ofthe saw,tl1e feed-pawl engaging the teeth of the saw, and theconnections between said feed-pawl and the operating-lever, consistingof the rockshaft, the arm on one end of said rock-shaft and having thefeed-pawl adjustablysecnred to its top, the crank on the other end ofthe rock-shaft, the slotted crank-arm on the pivotal shaft of theoperating-lever, and the adjustable link connected with said slottedcranlearni and with the crank of the rock shaft, all arranged andadapted to operate substantially as described.

I11 Witness whereof I have hereunto set my hand.

BARTLETT MCINTIRE.

Vitnesses:

S. H. Nonasn, H. 0. Inn.

